I've read several posts that indicate it might be very tough (or impossible)
to get 2 sounds cards to play nice together. Best is to just disable your
build-in one (maybe in BIOS).
alsamixer should allow you to pan audio from a channel (single input)
across L/R headset.
The alsamixer manpage has this:
[Q | W | E ] -- turn UP [ left | both | right ]
[Z | X | C ] -- turn DOWN [ left | both | right ]
As far as one "showing up as stereo" ... I looked in the output
of your "amixer -c 1" command you showed in the previous
post. I see no indication of stereo.... maybe I missed it?
.. I DO see several indications of mono.
I don't know your level of knowledge, and sometimes even the
best of us overlook the simplest things... but I feel I should make
sure you do know that the meaning of a "stereo" sound is a sound
that has two (usually at least slightly different) signals/channels.
One is normally panned fully to the left and the other usually panned
fully to the right. For the most part they usually sound very similar so
you get the sense of the same sound coming in to both ears
(but that's an illusion).
A "mono" sound is just one signal/channel. It sounds funny (bad) if
it's panned fully to the left or right, so normally it's panned to the center.
This way you're still hearing just one signal, but it's going half and half
in to both ears.
If you already knew all that, perhaps it can help someone else :)
At any rate... try alsamixer with the panning tips above and see
if that works out for ya.
David
On 2/16/06, Joshua 'Yoda' Cowles <[EMAIL PROTECTED]> wrote:
> Everything looks good in alsamixer, as far as I can tell. How to I
> check/change how the input is panned? I still think it's strange that
> one shows up as a "stereo" input even if it is truly just mono on L&R,
> while the other shows as "mono".
>
> Any tips on panning?
>
> Also, as an added bonus I noticed the existing (integrated/PCI)
> soundcard is not working properly since I installed the Mobilepre. If I
> try to play something I get a couple slpit seconds of choppy audio and
> then it just freezes whatever is playing and stops.
>
>
> David Slimp wrote:
>
> >Well, I'm not familiar with the amixer output, so perhaps someone else
> >can give a better answer... however, my FIRST thoughts are:
> >1) I don't know of any single microphones that are stereo, after all
> >it's a single mic (input).. how would you be getting two different sounds?
> >2) Just because a signal is heard on left AND right headphones does
> >not mean the sound is stereo. It just means the mono signal is panned
> >in the center... so you get the same sound/signal sent to both L/R.
> >3) Your second mic/input is probably panned fully to the right, so you
> >could try to pan it to the center, which is probably what you're looking for.
> >
> >Have you tried running alsamixer ?
> >Do the volume settings look good there?
> >
> >David
> >
> >
> >On 2/16/06, Joshua Cowles <[EMAIL PROTECTED]> wrote:
> >
> >
> >>Well, after a LOT of mostly ALSA-unrelated tinkering, I finally have my
> >>M-Audio Mobilepre USB set up.
> >>
> >>For the unfamilar:
> >>http://www.m-audio.com/products/en_us/MobilePreUSB-main-1.html
> >>
> >>BUT, it's still not quite right. The first microphone is stereo. (Channel
> >>1) is stereo, I can hear it in both ears when listening to the monitor
> >>headphones. Channel 2, however, is mono! I can only hear it in my right
> >>ear. amixer spits out the following:
> >>
> >>$ amixer -c 1
> >>Simple mixer control 'PCM',0
> >> Capabilities: pvolume cvolume pswitch pswitch-joined cswitch
> >> cswitch-joined
> >> Playback channels: Front Left - Front Right
> >> Capture channels: Front Left - Front Right
> >> Limits: Playback 0 - 31 Capture 0 - 31
> >> Front Left: Playback 29 [94%] [on] Capture 29 [94%] [on]
> >> Front Right: Playback 29 [94%] [on] Capture 29 [94%] [on]
> >>Simple mixer control 'PCM',1
> >> Capabilities: volume volume-joined
> >> Playback channels: Mono
> >> Capture channels: Mono
> >> Limits: 0 - 1
> >> Mono: 1 [100%]
> >>Simple mixer control 'Speaker',0
> >> Capabilities: pvolume pswitch pswitch-joined
> >> Playback channels: Front Left - Front Right
> >> Limits: Playback 0 - 31
> >> Mono:
> >> Front Left: Playback 30 [97%] [on]
> >> Front Right: Playback 30 [97%] [on]
> >>Simple mixer control 'Speaker',1
> >> Capabilities: pvolume pswitch pswitch-joined
> >> Playback channels: Front Left - Front Right
> >> Limits: Playback 0 - 31
> >> Mono:
> >> Front Left: Playback 29 [94%] [on]
> >> Front Right: Playback 29 [94%] [on]
> >>
> >>
> >>I think that PCM,1 is supposed to be the second microphone input channel,
> >>which makes sense because it's listed as Mono. So it's definitely a
> >>settings/driver problem rather than hardware like a loose connection or
> >>something.
> >>
> >>So my question is two fold:
> >>
> >>1) Any idea what is going on here? Why is it mono?
> >>
> >>2) More importantly, is there any way I can change it to be stereo like
> >>the other microphone?
> >>
> >>
> >>Any ideas, suggestions, whatever would be greatly appreciated. I'm not
> >>sure what else to do at this point. I really need some help.
> >>
> >>Thanks,
> >>Josh
> >>
> >>
>
>
--
David Slimp
[EMAIL PROTECTED]
http://www.MySpace.com/rock808
=
"On proprietary platforms, eventually you'll run into 'you can't do that.'
On open platforms, you'll run into 'you have to learn more to do that.' "
-- Ian Smith-Heisters
-------------------------------------------------------
This SF.net email is sponsored by: Splunk Inc. Do you grep through log files
for problems? Stop! Download the new AJAX search engine that makes
searching your log files as easy as surfing the web. DOWNLOAD SPLUNK!
http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642
_______________________________________________
Alsa-user mailing list
Alsa-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/alsa-user
